Jahnsite with Segelerite & Leucophosphite

Availability

Sold

Size

8 x 4 x 3 cm - Sm Cabinet 

Formula

CaMn²⁺Fe²⁺₂Fe³⁺₂(PO₄)₄(OH)₂·8H₂O (RRUFF)

Locality

Tip Top mine, Custer Co., South Dakota, United States

Tagged

phosphate , pegmatite mineral

Yellow Jahnsite crystals to less than 0.5mm in thick growth across the Heterosite matrix. There are some variations in color from yellow to a darker greenish yellow and to a red Jahnsite. I cannot differeniate which Jahnsites these are based on color, but they are not the original (CaMnMg) species.

On the backside of the specimen are some nice little acicular crystals of Segelerite. The one in the photo is about 0.5mm. There are three more crystals not seen.

The purple you see are dark Leucophosphite crystal grains. There is one nice crystals. The white acicular groups are carbonte apatite. There is also a little Rockbridgeite, minor Tavorite, and other minerals.